Fog rolls in over the Trinity River and the Margaret Hunt Hill Bridge in downtown Dallas early Thursday morning on May 23, 2013.2013.

Dallas’ newest and arguably most famous span — the Margaret Hunt Hill Bridge over the Trinity River — is getting its first check-up.

And that means drivers traveling between downtown Dallas and west Dallas next week will face lane closures, as Texas Department of Transportation workers scale the bridge’s 400-foot arch and dangle over traffic lanes to inspect the span.

TxDOT looks at every bridge in the state once every two years. And while the Hunt Hill Bridge opened to traffic only 14 months ago, the Santiago Calatrava-designed span is due for its routine examination.

On Monday and Tuesday, from 7 a.m. to 4 p.m., the bridge’s two left lanes in both directions will be closed. On Wednesday, from 7 a.m. to 4 p.m., the eastbound side’s shoulder and two right lanes will be shut down. And on Thursday, from 7 a.m. to 4 p.m., the westbound side’s shoulder two right lanes will be closed.

All those closures are contingent upon weather permitting workers to scale the bridge. And even though TxDOT announced the inspection as a traffic advisory, officials also cautioning drivers to not be alarmed by workers up on the bridge.

For more information on roads and traffic updates, follow TxDOT’s Dallas office on Twitter at @txdotdallaspio.

The Trinity River covers parts of Sylvan Avenue inside the levees on the west side of the Trinity River in September 2010.

The stretch of Sylvan Avenue that crosses the Trinity River will close Saturday as the Texas Department of Transportation begins in earnest the months-long process of building a bridge over the occasionally flooded bottomlands.

That means drivers will have to detour across the Margaret Hunt Hill or Hampton Road bridges to get from the Stemmons Corridor to West Dallas until the $42.3 million project is finished in spring 2014.

Anyone catching one last ride today across Sylvan — deemed by the city as “the last of the Dallas streets low water crossings — will notice there’s already huge pilings in place that give a pretty good sense of the new bridge’s height.

TxDOT and the city added that the rebuilt bridge, which will be continuous over the Trinity’s levees, will help provide more consistent traffic through the area “without the threat of floodwaters closing the road.”